window._requestAF = (function() {
  return window.requestAnimationFrame ||
	 window.webkitRequestAnimationFrame ||
	 window.mozRequestAnimationFrame ||
	 window.oRequestAnimationFrame ||
	 window.msRequestAnimationFrame ||
	 function(/* function FrameRequestCallback */ callback, /* DOMElement Element */ element) {
	   window.setTimeout(callback, 1000/60);
	 };
})();


